Detachable cover for cooking vessels



Aug. 6,-- 1929. R. N. KIRCHER DETACHABLE COVER FOR COOKING VESSELS ori inal Filed Nov.

"f IN VEN TOR.

Ra Iph 1V. Kz'rch er ATTOIRNEY.

Reissuedy Aug. 6, 192-9.

RALPH N KIRGHER, 0F WEST BEN'D,

= UNITED; STATESPATENT OFFICE.

WISCONSIN, AssIG'NoR TO wns'r BEND v ALUMINUM COMPAN Y,VA CORPORATION OF WISCONSIN.

DETAGIIABLE Coven Eon cooxmevnssnts.

Original No. 1,641,681, dated SeptemberG, 1927, Serial No 66,905 filed November 5, 1925. Application for reissue filed .Tune 17,

The invention relates to cooking vessels and is moreparticularly directed to a detachable cover for a class of cooking vessels better known'aswaterless cookers andhas for its primary object the. provision of locking means for preventing the cover of the boiler from being forced therefrom by the pressure.

of steam within the cooker. p

A furtheroloject of the invention isto provide-incombination with the improved lock ing means a novel form ofconstruction-ofthe seat. on the top of the vessel which cooperates with the cover in securing a. steam tight fit between thecover and the vessel. y j

A still further object of theinvention is to provide, cooking vessel having a seat formed, therein which is adapted to receive the cover in such a manner that when the,

locking means is released the cover canbe removed without any effort and at'the same A time when the lockingmeans is clamped will i insure asteam tight fit between thecover and the vessel. I A further obj vide an improved lock or clamping means which may bereadily swung up out of its operative position onto the top of the cover so as not to interfere orhinder the removal of the cover from the cooking vessel.

to provide angimproved" locking or clamping top oftlie vessel. 1

'These and {other objects are obtained providing a construction and an arrangement of the various parts in the manner hereinafter describedand particularly pointed out in the app ended claims.

Referring to the drawings, Fig. 1 is a side elevational' view of the ve'sselpartly in cross section showing my improvement embodied therein. o p

v Fig. 2 is an enlarged top plan view of my improved looking or clamping member.

Fig.3 is anenlarged top plan view of, my

improved looking or clamping member swung into. its inoperative position or in a position so as notto interfere with the-removal of the coverfrom the vessel. f Figl' 4t is "a fragmentary sideelevational view showing my improved looking or damp ing member in an intermediate position or in a position previous to clamping or secur ng f the cover to the vessel, and

ect of theinvention is to pro- 1929. Serial No. 371,599.

a seat or peripheral recess formed on the upper edge of thecooking vessel which per mits the ready or easy removal of the cover from, the vessel when the clamping members aredisengaged or in their inoperative posi tion but insures a snug or steam tight iit between the cover andfthe vessel when the locking or clampingjmeans are intheir operative or clamped position. This is accomplished by 3roviding a seat or peripheral groove by bending the wall of the vessel outwardly and slightly upwardly as shown'at 11, thencejvertically upwardly as shown-at 12 terminating the )upper edge thereof in anannular bead 13 ,ar0und the top of the vessel. This construction in addition topro ducing a. suitable seatforthe cover also re nforces or strength ens the upper part of the cooking vessel. A still further object of the invention is -Mounted withinlthe seat or peripheral groove in the top of the vessel is a dome-like cover 14 whichqisv provided with the usual handle 15; and steam valve 16. .The outer edge or the periphery of the cover 14 extends vertically downward from the dome-like top of'thecover as shown at adistance slightly greater. than the vertical. extension 12 of the vessel. The formation of the upstanding wall 12 surrounding the step and recess at the top of the vessel, and of the depending wall 17 on the edge of the cover, so that such walls 12 and 17 are of approximately the sameheight and engage each other over a widened area of contact, as shown inthe drawing; contributes; greatly to the snug or steam tight fit between the vessel and its 1 cover, before referred to, and so conserves the'steam and prevents its escape from the vessel when the cover is'clan ped in position theron, except through the steam valve or pressure reliefvent 16. The lower end of the cover-is rolled inwardly to form a reinforcing an nular bead 18 about the lower edge of the cover and is adapted to engage the inclined portion '01: seat 11 of the vessel adjacent the bead 18 with the surface of the inclined portion of the seat 11 of the vessel adjacent the fillet 19.

For co-operating with niy improved vessel and cover construction I have provided an improved form of clamping means which comprises a bracket 20 secured by means of rivets 21 adjacent the periphery of the cover. The bracket has its outer end rolled as shown at 22 to form a. support for and to have secured therein a transverse bearing pin 22. livotally mounted on the bearing pin 22 is an actuating lever or clamping member 23 which has its free end turned upward as shown at 24 so as to afford a convenient grip tor the operator in manipulating the clampingmeans. The actuating lever or clamping member 23 is pivotally secured to the pin 22 by havin the bifurcated portions 25 bent downwardly and embracing the pin. The intermediate portion of said lever is bent upwardly and rolled as shown at 26 to form a.

support for and to retain therein a pin 27 which forms the pivotal support for the hook 28. The hook 28 is pivotally secured to the pin 27 by bifurcated portions 29 and has a portion thereof in the form of the arc of a circle as shown at 30 withthe outer end thereof substantially fiat as shown at 31 so as to engage the lower or outer side of the seat 11 of the vessel.

The clamping member 23, the hook member 28, and the bracket 20 are preferably formed as shown in the drawings of ductile and resilient sheet metal whereby they may be conveniently manufactured by suitable cutting and forming mechanisms and by formin g the same of the material stated and in the manner and form described, the bracket, when secured to the lid of the cover will lie close thereto and the clamping member 23 pivotally connected therewith, will also, in its looking or closed position, lie close to thetop of the vessel cover and upon the top of the bracket 20. Thus, when the cover is in position on the vessel with the clamping mem bers in looking or closed position, the vessel including the cover and clamping members presents a neat appearance as all the locking parts he close to the top of the cover as shown in Fig. 1 of the drawing, so that the vessel presents a neat and attractive appearance with the cover thus locked in position on the top of the vessel in a permanent and secure manner that will permit the vessel to be carried by the cover handle 15 without any danger of separation of the cover and vessel, it it is desired by the operator to so carry it. I

From the above it will be noted that by reason of the pivot of the hook 28 being mounted eccentrically with respect to the pivot 22 of the lever or clamping member 23 that as said lever is actuated from the position shown in Fig.4 to the full line position shown in Fig. 1, that the pivot 27 of the hook 28 will pass dead center and thereby resiliently clamp the detachable cover in such a manner that the annular bead 18 of the cover is pressed into engagement with the seat 11 of the vessel. It will also be noted that by reason of the construction of the hook 28 a resilient pressure is exerted by, the clamp in retaining the cover in its seat on the vessel.

In the actual use of my improved detachable cover I have found it convenient to use four such clamps arranged substantially at 90 degrees about the periphery of the cover, but it will of course be understood that a more or-less number of these clamping devices may be conveniently employed. It will further be noted that when it is desired to remove the cover from the cooking vessel after the clamping member or lever has been actuated to disengage the hook from its clamping or locked position that the lever and hook may be swung into inoperative position or the position shown in dotted lines in Fig. 1 (which is the same position as shown in Fig. 3) in which position the clamping means is swung up on top of the cover and when in this position the cover may be readily re-' moved without the clamping member interfering withits removal.

lVhilein the above specification I have de scribed one embodiment which my invention may assume in practice, it will of course be understood that various modifications may be made without departing from the spirit and scope of the invention as expressed in the following claims.

lVhat I claim as my invention and desire to secure by Letters Patentis:

1. In combination with a metal pressure cooking vessel having a bottom. and side walls and a recess formed in the top of said vessel by bending the metal of the walls outwardly to form a seat, thence upwardly to form an upstanding vertical wall, of a detachable cover mounted in the seat in said vessel, the edge of the cover closely engaging the upstanding vertical wall, a clamping member pivotally mounted on said cover, and having a hook adapted to engage the underside of the seat of said vessel for detachably clamping said cover to said vessel.

2. In combination with a metal pressure cooking vessel having a bottom and side walls and a recess formed in the top of said vessel by bending the metal of the walls outwardly to form a flat seat, thence upwardlyto form an upstanding vertical wall, of a detachable cover mounted in the seat in said vessel, the cover having a depending wall of approximately the height of the upstanding vertical wall to increase the area of contact between i the saidwalls, a clamping memberpivotally mounted on said cover, and ahook pivoted to said clamping memberhav ng the free end 1 thereof flattened so as to engage the flat surand a recessformed' in the top of said vessel I bending the material of the walls outwardly I bybending the metal of the walls outwardly toform a seat, thence upwardly to form an upsjtanding vertical wall, of a detachable cover mounted in the seat in saidvessel, the

' cover having a depending wall of approx mately the height of the upstanding vertical wall to increase the area of contact between the said walls, a plurality of bracketssecured in spacedrelation about the periphery of said cover, actuating levers pivoted to said brackets, and hooks pivoted to and. eccentrically with respect to. the pivot of said actuating levers whereby the actuation of said actuating levers locks the pivot of the hook past dead center thereby detachably securing said cover to said vessel.

t. In combination with a pressure cooking vessel having a bot-tom and side walls and a seat formed adjacent the top of said vessel by to form theseat,- thence vertically to form an upstandingwalh'a detachable cover mounted on said seat, the coverjhaving a depending Wall of approximately the height of the upstanding verticalwall to increase the area of contact between the said walls, a clamping member pivotally mounted on said cover, and a resilient hook pivoted to sa1d clamping member and adapted to engage the underside of the seat of said vessel for detachably' clamping said cover to said seat.

' 5. in. a lockmg device for a cooking vessel having a detachable cover,a bracket mounted on said cover, a clamping member having bi furcated hinge portions pivotal-1y connected to said bracket, ahinge portion extending laterally from said member intermediate saidbifurcated portions, and resilient hook pivk oted to said last mentionedhinge portion and i engageable withsaid vessel for clamping said cover thereto.

- 6. In a locking device for a oookingvessel having a detachable cover, a bracket mounted on said cover-,a clamping member adapted to lie close to said cover and having at one end a hinge portion pivotally connected to said bracket, a hinge portion extending laterally from said clamping member intermediate its pivotal point and its free end, and a. resilient hook pivoted to said last mentioned hinge portion and engageable with said vessel for "clamping said cover thereto.

7. In a locking device for. a cooking vessel having a detachable cover, a bracket mounted "onsaid cover, a clamping member adapted to lieclose to said cover and having bifurcated hinge'portions adapted to receive andbe pivotally connected to saidbracket, a hinge portion formed integrally with said clamping member and extending laterally therefrom intermediate said bifurcated portions, and a resilient hook having a bifurcated end portion adapted to-receive and be pivotally con nected to said last mentioned hinge portion and its opposite end portion engageable with said vessel for clamping said cover thereto.

8. In .a locking device for a cooking vessel having a detachable cover, a bracket mounted on said cover, a clamping member formed of relatively thin flat material pivotally con-- nected to said. bracket whereby a portion of the material of said relatively thin flat clamping member will lie close to and approximately parallel with the upper surface of said cover when the clamping member is in closed position, a hinge portion formed integrally with said clamping member and extending at an angle to the flat surface thereof, and a hook formed of resilient relatively thin material pivoted to the said last mentioned hinge portion and engageable with said vessel for clamping said cover thereto.

9. In a locking device fora cooking vessel havinga detachable cover, a bracket 011 said cover-{said bracket being formed of relatively thin sheet metal, a clamping member formed of relatively thin sheet metal provided with a hinge portion at one end thereof, a hinge portion on said bracket, a pivot pin for connecting said clamping memberwith said bracket, a hinge portion formed on said clamping member intermediate the said hinge connection thereof with said bracket and'the free end of the clamping member, the last said hinge portion projecting from one of theflat 1 surfaces of said clampin member, and a hook formed of resilient sheet metal pivotally connected with the last said hinge member of the said clamping member and engageable with said vessel for clamping saidcover thereto.

' '10. In a locking device for a cooking vessel having a detachable cover, a bracket mounted on said cover, said bracket being formed of relatively thin sheet metal, a clamping meniber formed of relatively thin sheet metal provided with a hinge portion at one end thereof, a hinge portion on saidbracket, a pivot pin for connecting said clampingmember with said bracket, a hingeportion formed on said. clamping member intermediate the said hinge connection thereof with said bracket and the free end of the clamping member, and. a hook formed of resilient sheet metal pivotally connected with the last said hinge .IIlfil'IllJGl' of the sand clampmg member and engageable, with sald vesselfor clamplng sald cover.

thereto.

and adapted to lie with one side close to said cover While in clamping position, and a hook engageable with said vessel for clamping said cover thereto, said hook being pivoted to said clamping member at a point intermediate the pivotal point and free end of the latter.

12. In a locking device for a cooking vessel having a detachable cover, a bracket mounted 011 said cover, a relatively Wide clamping member pivotally connected to said bracket and adapted to lie with one side substantially parallel to saidcover to reduce the extent of the vertical projection of said member while in clamping position, and a hook engageable With said vessel for clamping said cover thereto, said hook being pivoted to said clamping member at a point intermediate the pivotal point and free end of the latter.

In testimony whereof I have signed my name at Vest Bend, this 30th day of April, 20

RALPH N. KIROI-IER. 

